Muffler fixing structure

Abstract

To provide a muffler hanger having suppressed deterioration of processability and high corrosion resistance, and a fixation structure for a muffler using the muffler hanger.SOLUTION: A muffler hanger related to the invention includes a core material formed with iron or an alloy composed mostly of iron, and an outer coat coating the core material and formed with aluminum or an alloy composed mostly of aluminum. The muffler hanger includes a body part, and an end part continuing from one end of the body part and forming flat shape.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a muffler hanger and a fixing structure for a muffler.

Background Art

[0002] In a vehicle, a muffler is supported by a muffler hanger (see, for example, Patent Documents 1 and 2). The muffler hanger is formed using ferritic stainless steel or austenitic stainless steel.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, although ferritic stainless steel has high strength as a member, it has a drawback of poor workability. On the other hand, austenitic stainless steel has excellent workability, but there is a risk of stress corrosion cracking. For this reason, a muffler hanger that suppresses stress corrosion cracking while suppressing a decrease in workability is desired.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a muffler hanger and a fixing structure for a muffler that have high corrosion resistance while suppressing a decrease in workability.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, the muffler hanger according to the present invention is a muffler hanger comprising a core material formed from iron or an alloy mainly composed of iron, and an outer shell covering the core material, which is formed from aluminum or an alloy mainly composed of aluminum, and is characterized by comprising a main body portion and an end portion connected to one end of the main body portion and having a flat shape.

[0007] Furthermore, the muffler hanger according to the present invention is characterized in that, in the above invention, the end portion has a curved shape corresponding to the outer surface of the muffler to be supported.

[0008] Furthermore, the muffler fixing structure according to the present invention is characterized by comprising a main body portion and a muffler hanger having a flattened end portion connected to one end of the main body portion, the main body portion having a core material formed from iron or an alloy mainly composed of iron, and an outer skin covering the core material, formed from aluminum or an alloy mainly composed of aluminum, and in contact with the end portion of the muffler hanger, and a joining member that penetrates the contact position between the muffler hanger and the muffler and joins the muffler hanger and the muffler.

[0009] Furthermore, the muffler fixing structure according to the present invention is characterized in that, in the above invention, the end of the muffler has a curved shape corresponding to the outer surface of the muffler.

[0010] Furthermore, the muffler fixing structure according to the present invention is characterized in that, in the above invention, the joining member comprises a shaft portion that penetrates the contact position and a head portion provided at the end of the shaft portion, the head portion is provided at the outer edge on the side from which the shaft portion extends and has an edge portion having a sharp tip shape, and the edge portion is pressed against the outer skin. [Effects of the Invention]

[0011] According to the present invention, it is possible to obtain a muffler hanger with high corrosion resistance while suppressing a decrease in processability. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a perspective view showing a muffler fixing structure according to one embodiment of the present invention. [Figure 2] Figure 2 is a cross-section along line AA shown in Figure 1. [Figure 3] Figure 3 is an enlarged view of a portion of Figure 2. [Figure 4] Figure 4 is a perspective view showing the configuration of the main parts of a muffler hanger according to one embodiment of the present invention. [Figure 5] Figure 5 is a perspective view showing the configuration of the base material for manufacturing a muffler hanger according to one embodiment of the present invention. [Figure 6] Figure 6 is a diagram illustrating the formation of a muffler fixing structure according to one embodiment of the present invention. [Modes for carrying out the invention]

[0013] Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as "embodiments") will be described with reference to the attached drawings. Note that the drawings are schematic, and the relationship between the thickness and width of each part, the ratio of the thickness of each part, etc., may differ from reality, and there may be parts where the dimensional relationships and ratios differ between drawings.

[0014] (Embodiment) A muffler fixing structure according to one embodiment of the present invention will be described. Figure 1 is a perspective view showing a muffler fixing structure according to one embodiment of the present invention. Figure 2 is a cross-section along line AA shown in Figure 1. Figure 3 is an enlarged view of a part of Figure 2 (the dashed area in Figure 2).

[0015] The fixing structure 1 of the muffler includes a muffler hanger 10, a muffler 20, and a joining member 30 that joins the muffler hanger 10 and the muffler 20.

[0016] The muffler hanger 10 is formed using a clad material having a concentric two-layer structure composed of a core material 10a and an outer skin 10b with different components (see FIG. 2). The core material 10a is formed using a material with high mechanical strength and excellent workability, such as iron or an alloy (ferroalloy) mainly composed of iron. Also, the outer skin 10b covers the core material 10a and is formed using a material with corrosion resistance, such as aluminum or an alloy (aluminum alloy) mainly composed of aluminum.

[0017] FIG. 4 is a perspective view showing the configuration of a main part of the muffler hanger according to an embodiment of the present invention. The muffler hanger 10 has a main body part 11 that extends in a columnar shape and an end part 12 that forms one end of the main body part 11 and is connected to the muffler 20. The end part 12 has a flat shape and is curved in an arc shape according to the shape formed by the outer circumference of the muffler 20. Note that the end of the main body part 11 on the side opposite to the end part 12 side is fixed to the vehicle. Also, the muffler hanger 10 will be described as having the core material 10a exposed on the tip surface on the side opposite to the main body part 11 side of the end part 12, but it may also be configured such that the core material 10a is covered by the outer skin 10b on this tip surface.

[0018] The muffler 20 extends in a cylindrical shape and discharges exhaust gas and the like generated in the vehicle to the outside. The muffler 20 is formed using iron or an alloy mainly composed of iron, such as stainless steel.

[0019] The joining member 30 has a shaft part 31 with a tapered tip shape and a head part 32 provided on the base end side of the shaft part 31. The head part 32 is provided on the outer edge on the side where the shaft part 31 extends and has an edge part 32a with a sharp tip shape. The joining member 30 is formed using a material, for example, with a higher hardness than the outer skin 10b.

[0020] In the fixing structure 1, with the end portion 12 of the muffler hanger 10 in contact with the outer surface of the muffler 20, the joining member 30 penetrates the end portion 12 and one side surface of the muffler 20. At this time, the edge portion 32a of the joining member 30 bites into and is press-fitted to the outer skin 10b of the end portion 12 (see FIG. 3).

[0021] Subsequently, the formation of the fixing structure 1 of the muffler will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view showing the configuration of a base material for manufacturing a muffler hanger according to an embodiment of the present invention. The muffler hanger 10 is manufactured using the base material 100 shown in FIG. 5. The base material 100 has a concentric two-layer structure composed of a core material 101 formed using iron or an iron alloy and an outer skin 102 that covers the core material 101 and is formed using aluminum or an aluminum alloy.

[0022] The muffler hanger 10 is manufactured by flattening one end of the base material 100 and then curving it to fit the outer circumference of the muffler 20 to be connected.

[0023] FIG. 6 is a diagram for explaining the formation of the fixing structure of the muffler according to an embodiment of the present invention. The fixing structure 1 of the muffler is formed by driving the joining member 30 with the muffler hanger 10 and the muffler 20 in contact. At this time, the joining member 30 is driven into the muffler hanger 10 until the edge portion 32a of the head portion 32 is press-fitted to and bites into the outer skin 10b. A known method can be adopted for driving the joining member 30. For example, a technique called Flow Drilling Screw: FDS (registered trademark) or ImpAct (Impulse Accelerated Tracking) can be adopted.

[0024] In the embodiment described above, the muffler hanger 10 is formed using a clad material that has a concentric two-layer structure composed of a core material 10a and an outer shell 10b having different components. The clad material consists of a core material 10a made of iron or an iron alloy, and an outer shell 10b that covers the core material 10a and is made of a corrosion-resistant material, such as aluminum or an aluminum alloy. According to this embodiment, a muffler hanger with high corrosion resistance can be obtained while suppressing a decrease in workability. Furthermore, by piercing the muffler hanger 10 and the muffler 20 with a joining member 30 and biting the head 32 (edge ​​portion 32a) of the joining member 30 into the outer shell 10b, a fixing structure that stably supports the muffler can be obtained while suppressing leakage of the medium (exhaust gas, etc.) flowing through the muffler from the joint.

[0025] In this embodiment, the core material and the outer shell were described as having a concentric two-layer structure, but they may also have an eccentric two-layer structure. For example, the outer shell 10b on the side that contacts the edge portion 32a of the joining member 30 may be made relatively thicker.

[0026] Furthermore, although the embodiment described an example in which the main body 11 extends in a cylindrical shape, it is not limited to this, and may extend in a plate shape, or have an elliptical cross-section.

[0027] Furthermore, although the embodiment described an example in which the end portion 12 does not have a flattened shape and has a curved shape corresponding to the outer circumferential surface of the muffler 20, it is not limited to this, and may, for example, extend in a plate shape, extend with an elliptical cross-section, or extend with the same shape as the main body portion 11.

[0028] Furthermore, in this embodiment, if the head of the joining member is pressed against the outer skin 10b and airtightness between the muffler 20 and the head is ensured, then a configuration can be made in which an edge portion 32a is not formed on the head 32 of the joining member 30.

[0029] While embodiments for carrying out the present invention have been described so far, the present invention should not be limited to the embodiments described above.

[0030] Thus, the present invention may include various embodiments not described herein, and various design modifications can be made without departing from the technical idea specified by the claims.

[0031] As described above, the muffler hanger and muffler fixing structure according to the present invention are suitable for obtaining a muffler hanger with high corrosion resistance while suppressing a decrease in processability. [Explanation of Symbols]

[0032] 1 Fixed structure 10 muffler hangers 10a Core material 10b Hull 11 Main body 12 End 20 Muffler 30 Joining members 31 Shaft 32 Head 32a Edge section

Claims

1. A muffler hanger comprising a core material formed from iron or an alloy mainly composed of iron, and an outer shell covering the core material, formed from aluminum or an alloy mainly composed of aluminum, having a main body and an end connected to one end of the main body and having a flattened shape, A cylindrical muffler formed from iron or an alloy mainly composed of iron, which contacts the end of the muffler hanger, A joining member that penetrates the contact point between the muffler hanger and the muffler and joins the muffler hanger and the muffler, A muffler fixing structure characterized by comprising the following:

2. The end of the muffler hanger has a curved shape corresponding to the outer surface of the muffler. The muffler fixing structure according to feature 1.

3. The aforementioned joining member is A shaft portion that penetrates the aforementioned contact position, A head provided at the end of the shaft portion, Equipped with, The head portion is provided on the outer edge of the side from which the shaft portion extends, and has an edge portion that forms a sharp tip shape. The edge portion is pressed against the outer shell, The muffler fixing structure according to feature 1 or 2.

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